Sectional reinforced-concrete pole.



J. A. GRIFFIN.

SECTIONAL REINFORCED CONCRETE POLE.

APPLICATION FILED JULY 13, 1911.

1,033,887. Patentd July 30,1912.

Joan A. GRIFFIN, or LOS ANGELES, cnLIr'onnm;

SEGTIONAL REINFORCEIl-CONCRETE POLE.

Application filed July 13, 1911. Serial No. 638,357.

To all whom it may concern:

die it known that I, JOHN A. GRIFFIN, a citizen of the United States,residing at Los Angeles, inthe county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Sectional'Beinforced-Concrete Poles, of which the following is a specification.

This invention relates to certain new and useful improvements insectional reinforced concrete polesu The essential object of theinvention is to provide a structure of this type wherein the pole ismade in sections at the factory or other place, and conveyed ortransported to the point or points at which the poles are to be erected,and the invention further aims to provide a pole which has strengthequivalent to that of a monolithic pole and possesses the advantage overthe latter -of safety and economy in transportation, manufacture anderection.

Further and other objects will be later apparent.

'In the drawings: Figure 1 1s a perspective view of one of the sections,Fig. 2 is a top plan view thereof, and Fig. 31s a side elevation showinga pole in the process of erection.

In accordance with the present invention the pole is made of a pluralityof sections 1 which are of suitable shape and dimensions. In the presentinstance I have illustrated a pole of tapering form in which the same iswide at the base and decreases in diametertoward the top. The sectionsare depicted in the drawings as of annular or cylinderlikevconformation, having hollow interiors. It will be understood however,that any other cross sectional sha e 'of the sections.

' p cured thereon in any approved or suitable may be employed. withoutdeparting from the spirit or scope of the invent-ion. As clearlydepicted in Fig.1 of the draw,-

ings each section is formed with a plurality of spaced longitudinalperforations 2 which extend through the top and bottom of the section.Each section is molded wit-h a plurality oflongitudinal rods 3 which attheir ends extend beyond the top and bottom faces ofthe sections, therods 3 being located in the spaces between the perforations 2 as ings.

. are of shown in Figs-11 and 2 of the. drawclearly Itwill be observedthat the rods 3 be escribed.

less cross sectional area than that of "theerforation's' 2; fora purposeshortly to I pole which repossessedof great strength By referring toFig. 3 of the drawings it will be seen that a base block or othersuitable foundation 4 which may be formed of concrete, is provided, thelatter having a seriesof vertical-perforations formed there- 'in', intowhich the lower ends of the' rods 3, that project from the bottom faceof the lowermost section, project. The base 4 may be either molded withthe perforations to receive the rods 8 or the latter may be forced intothe base while the latter is in a semiplastic state. The lower. face ofthe lowermost section 1 seats on the top faceof the base 4 and when thevlatter sets or hardens,

it will be obvious that'the lowermost sectionwill be held rigidlyagainst any movement. If .the foundation 4 is previously formed withperforations, same are made sufficiently .75

sitioned as above set forth wet grout or concrete is poured into theperforations 2 thereof and before the'l same has or hardened the lowerends of the rods 3' of the adjacent upper section are'then inserted intothe perforations 2 and are embedded in the concrete or grout therein.The upper ends 3 of the lowermost section project into the perforations2 of the said adjacentupper section, and said perforations 2 of thelatter are then filled with wet grout or concrete so as to completelyfill said perforations and to completely surround the upper ends of therods 3 of the lowermost sectionwhich extends in said perforations. Theabove operation is repeated until the pole has attained the desiredheight, after which a cap Specification of Letters Patent. Patented uly30, 191 2. I

or other suitable top is either molded or semanner.

It will be seen from the above that the sections can be easily packedand safely transported or shipped, and that a pole may be made of any.desired or required height.

jacent sections and the adjacent sections have. rods which project intothe first named section, the sections cooperate to reinforce andstrengthen one another, and produce a 2'are indicated in dotted lines,the others- '5' being omitted for sake of clearness Concrete bonds mayalsobe placed in the'joints between the ends of the adjacent'sections.

In cases where the poles are used to sup-,

port telephone or telegraph wires, a cross arm or cross arms ofwood,-concrete, or othermaterial, can be attached to the poles atv thedesired height by bolting, clamping or. by any other suitable means.

What is claimed is: 1. A concrete-pole including a series of sectionsarranged in superposed order, each sectionhaving spaced longitudinalperforations that extend through the ends of the sections and rodsin'the spaces between the perforations whose ends project beyond theends 'of the section, the rods of one section being received in theperforations of the twoadjacent sections, and the rods of said twoadjacent sections being received in the perforations of said first namedsection.

2. A concrete pole section composed of a hollow body having reinforcingrods there-.

. in which extend beyond the ends thereof, 3 said body having a seriesof spaced longitu- '-'dinal openings therein, located between saidi'odlsand extending through the ends of the A concrete pole consistingof a base block, a vertically arranged section having :itsjlon'ter endseating on said base block, a

, zSBlies of spaced vertical rods embedded in :asaid section andprojecting beyond the top and bottom thereof, the lowerends of said rodsprojecting down into the base block, 40 said section being formed with aseries of vertical openings that are disposed in the spaces between saidrods, a second vertical section having its lowerend seating on the upperend of the first section, a series of bet-ween sa'id rods thereof, groutfilling the.

openings of both of said sections, the lower "ends of the rods of thesecond section ex.

tending into the openings of the first section and being embedded insaid grout therein, a third section that seats on the upper end of thesecond section, said third sectlon having vertical openings filled withgrout into which the rods that extend from the top end of the secondsection project, and rods embedded in the third section in the spacesbetween the openings thereof and projecting down into the openings ofthe second sectionand being embedded in the grout therein.

4. A concrete .pole including a plurality of vertically arrangedsections, the lower end of one section seating on the upper end,

of the adjacent lower section, each section being formed with a seriesof spaced vertical openings that extend through the top and bottomthereof, a series of rods embedded infeach section in the spaces betweenthe openings thereof and pro ecting beyond the top and bottom thereof,and grout in said openings, the projecting ends of the rods of onesection extending into the openings of the adjacent section and beingembedded in the grout therein, whereby each rod at itsends extendsacross the'joints formed by the abutting sections. f

In testimonywhereof I have hereunto .set my hand in presence of twosubscribing witnesses.

, JOH-NA. GRIFFIN. Witnesses L. P. ABELL, ALBERT E. TmMoNs.

Gopies a! this patent maybe obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

